In his introduction to a revolutionary theory of the cosmos, Martin
Bojowald shows how the big bang theory may give way to the big bounce
theory, which describes our universe as an eternal series of expansions
and contractions, with no beginning and no end.
Bojowald, then a twenty-seven-year-old postdoctoral student at
Pennsylvania State University, used a relatively new theory called loop
quantum gravity—a cunning combination of Einstein’s theory of gravity
with quantum mechanics—to create a simple model of the universe. Loop
quantum cosmology, or LQC, was born, and with it, a theory that managed
to do something even Einstein’s general theory of relativity had failed
to do—illuminate the very birth of the universe.